{"id":"CVE-2021-42841","aliases":["EUVD-2021-29796","GHSA-p7q5-gpw3-mqfx"],"status":"published","title":"Insta HMS before 12.4.10 is vulnerable to XSS because of improper validation of user-supplied...","description":"Insta HMS before 12.4.10 is vulnerable to XSS because of improper validation of user-supplied input by multiple scripts. A remote attacker could exploit this vulnerability via a crafted URL to execute script in a victim's Web browser within the security context of the hosting Web site, once the URL is clicked. An attacker could use this vulnerability to steal the victim's cookie-based authentication credentials.","severity":{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.0088,"percentile":0.59368,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-79"],"published":"2022-01-06T20:04:34Z","modified":"2026-06-17T04:10:11Z","products":[{"vendor":"practo","product":"insta_hms"}],"references":[{"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/210416","tags":["x_refsource_MISC","x_transferred","Third Party Advisory","VDB Entry"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-42841"},{"url":"https://github.com/advisories/GHSA-p7q5-gpw3-mqfx"}],"sources":{"cve":[{"id":"CVE-2021-42841","description":"Insta HMS before 12.4.10 is vulnerable to XSS because of improper validation of user-supplied input by multiple scripts. A remote attacker could exploit this vulnerability via a crafted URL to execute script in a victim's Web browser within the security context of the hosting Web site, once the URL is clicked. An attacker could use this vulnerability to steal the victim's cookie-based authentication credentials.","status":"published","published":"2022-01-06T20:04:34Z","modified":"2024-08-04T03:38:50.162Z","updated_at":"2026-11-02T14:32:58.739039Z"}],"euvd":[{"id":"EUVD-2021-29796","description":"Insta HMS before 12.4.10 is vulnerable to XSS because of improper validation of user-supplied input by multiple scripts. A remote attacker could exploit this vulnerability via a crafted URL to execute script in a victim's Web browser within the security context of the hosting Web site, once the URL is clicked. An attacker could use this vulnerability to steal the victim's cookie-based authentication credentials.","status":"published","published":"2022-01-06T20:04:34Z","modified":"2024-08-04T03:38:50Z","updated_at":"2026-11-03T03:24:15.299027Z"}],"ghsa":[{"id":"GHSA-p7q5-gpw3-mqfx","title":"Insta HMS before 12.4.10 is vulnerable to XSS because of improper validation of user-supplied...","description":"Insta HMS before 12.4.10 is vulnerable to XSS because of improper validation of user-supplied input by multiple scripts. A remote attacker could exploit this vulnerability via a crafted URL to execute script in a victim's Web browser within the security context of the hosting Web site, once the URL is clicked. An attacker could use this vulnerability to steal the victim's cookie-based authentication credentials.","status":"published","published":"2022-01-07T00:00:31Z","modified":"2023-02-03T05:03:56Z","cwes":["CWE-79"],"updated_at":"2026-11-02T14:53:27.376431Z"}],"nvd":[{"id":"CVE-2021-42841","description":"Insta HMS before 12.4.10 is vulnerable to XSS because of improper validation of user-supplied input by multiple scripts. A remote attacker could exploit this vulnerability via a crafted URL to execute script in a victim's Web browser within the security context of the hosting Web site, once the URL is clicked. An attacker could use this vulnerability to steal the victim's cookie-based authentication credentials.","status":"published","published":"2022-01-06T21:15:08.08Z","modified":"2026-06-17T04:10:11.69Z","cvss":[{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"primary"},{"version":"2.0","score":4.3,"vector":"AV:N/AC:M/Au:N/C:N/I:P/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:07:03.418194Z"}]}}